在节点施加均布力的问题

/PREP7
ET,1,SOLID46
KEYOPT,1,2,0
KEYOPT,1,1,0
KEYOPT,1,3,2
KEYOPT,1,4,0
KEYOPT,1,5,2
KEYOPT,1,6,1
KEYOPT,1,8,1
KEYOPT,1,9,0
KEYOPT,1,10,0
*SET,_RC_SET,1,
R,1
RMODIF,1,1,8,0,0,0
RMODIF,1,7,0
RMODIF,1,13,1,0,0.0001,1,45,0.0001,
RMODIF,1,19,1,-45,0.0001,1,0,0.0001,
RMODIF,1,25,1,0,0.0001,1,-45,0.0001,
RMODIF,1,31,1,45,0.0001,1,0,0.0001,
MPTEMP,,,,,,,,
MPTEMP,1,0
MPDATA,EX,1,,132e9
MPDATA,EY,1,,10.3e9
MPDATA,EZ,1,,10.3e9
MPDATA,PRXY,1,,0.25
MPDATA,PRYZ,1,,0.38
MPDATA,PRXZ,1,,0.25
MPDATA,GXY,1,,6.5e9
MPDATA,GYZ,1,,3.2e9
MPDATA,GXZ,1,,6.5e9
BLOCK,0,0.18,0,0.06,0,0.0008,
FLST,5,1,4,ORDE,1
FITEM,5,3
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
LESIZE,_Y1, , ,10, , , , ,1
FLST,5,1,4,ORDE,1
FITEM,5,11
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
LESIZE,_Y1, , ,1, , , , ,1
FLST,5,1,4,ORDE,1
FITEM,5,2
CM,_Y,LINE
LSEL, , , ,P51X
CM,_Y1,LINE
CMSEL,,_Y
LESIZE,_Y1, , ,20, , , , ,1
MSHAPE,0,3D
MSHKEY,1
CM,_Y,VOLU
VSEL, , , , 1
CM,_Y1,VOLU
CHKMSH,'VOLU'
CMSEL,S,_Y
VMESH,_Y1
CMDELE,_Y
CMDELE,_Y1
CMDELE,_Y2
FINISH
LPLOT
FLST,2,2,4,ORDE,2
FITEM,2,1
FITEM,2,3
DL,P51X, ,ALL,
NPLOT
NSEL,ALL
NSEL,S,LOC,X,0.09
请问在节点上施加均不压力pressure步骤是什么样的？我发现根本就不能选择方向，默认是X向，我想加在Z向怎么办？、谢谢